Organic Chemistry — Chemistry STD 10 — Question

Name the acids, which are used in food industry.

Name the constituents of:
solder,

The list of some organic compounds is given below:
Ethanol, ethane, methane, ethyne and ethene
From the above list, name a compound:
Which forms chloroform on halogenations in the presence of sunlight?

Write the observation for the following:
A paper dipped in potassium permanganate solution is put on the mouth of a test tube containing sulphur dioxide gas.

Name:
a metal nitrate which on heating is changed into metal 

Which part of an organic compound determines physical properties ?

Write observation :
Lead nitrate solution is mixed with dilute hydrochloric acid and heated.

What is the purpose of the pH scale?

Name two gases which combine chemically to form a solid.